Effect of sludge cell disruption on compactibility of biological sludges

被引:73
作者
Erdincler, A [1 ]
Vesilind, PA
机构
[1] Bogazici Univ, Inst Environm Sci, TR-80815 Bebek, Istanbul, Turkey
[2] Duke Univ, Dept Civil & Environm Engn, Durham, NC 27708 USA
基金
美国国家科学基金会;
关键词
biological sludge; cell disruption; compactibility; liquid-solid separation; water distribution;
D O I
10.2166/wst.2000.0185
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Biological sludge contains various fractions of water associated with sludge solids which are mostly microorganisms. These water fractions affect the liquid-solid separation of sludge. A considerable amount of sludge water is trapped either inside the sludge microorganisms or within the flee structure and this is labeled interstitial water. Release of interstitial water held inside the cell structure involves disruption of sludge cells and this does not occur during conventional dewatering. In this study, sludge cell disruption is introduced as a new method to improve the compactibility of sludge. Biological sludge cells are disrupted by different methods including alkali treatment, NaCl treatment, heat treatment, and sonication. The effect of cell disruption on compactibility of biological sludge is investigated. The results of the study indicate that the disruption of the sludge cells changes the water distribution in sludge and improves the compactibility of sludge. Disruption apparently releases from 60% to 80% of interstitial water, depending on the disruption method used. On the other hand, it causes creation of extra surfaces for water binding and leads to an increase in the unfreezable water content (vicinal water, water of hydration and a fraction of interstitial water) of sludge. The cell disruption increases the solid content of compacted sludge up to 87% depending on the cell disruption method used.
引用
收藏
页码:119 / 126
页数:8
相关论文
共 20 条
[1]  
*AM PUBL HLTH ASS, 1995, STAND METH EX WAT WA
[2]  
*BIOR, 1994, LIF SCI RES PROD CAT, P69
[3]   DISRUPTION OF MICROBIAL-CELLS FOR INTRACELLULAR PRODUCTS [J].
CHISTI, Y ;
MOOYOUNG, M .
ENZYME AND MICROBIAL TECHNOLOGY, 1986, 8 (04) :194-204
[4]  
CLEGG JS, 1979, CELL ASS WATER, P363
[5]   PROPERTIES OF WATER IN BIOLOGICAL-SYSTEMS [J].
COOKE, R ;
KUNTZ, ID .
ANNUAL REVIEW OF BIOPHYSICS AND BIOENGINEERING, 1974, 3 :95-126
[6]  
DICK DAT, 1979, MECHANISMS OSMOREGUL, P3
[7]  
HEUKELEKIAN H, 1956, SEWAGE IND WASTES, V28, P558
[8]  
Israelachvili J., 1985, Intermolecular and Surface Forces
[9]  
JAVAHERI AR, 1969, J WPCF, V41, P197
[10]   BOUND WATER-CONTENT OF BIOLOGICAL SLUDGES IN RELATION TO FILTRATION AND DEWATERING [J].
KATSIRIS, N ;
KOUZELIKATSIRI, A .
WATER RESEARCH, 1987, 21 (11) :1319-1327